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A student reacts 0.15 g of magnesium metal with excess dilute hydrochloric acid to produce hydrogen gas, which she collects over water. What volume of dry hydrogen gas does she collect over water at 28°C and 101.8 kPa?
a breathalyzer instrument contains two ampules each of which contains 0.75 mg k2cr2o7 dissolved in 3 ml of 9 mol l-1
C2H5OH (liq) +O2(g) ------ CO2 (g) + H2O(g) reaction at 398 kevin and show the thermo-chemical cycle that accounts for each step necessary to calculate ΔH0 at a temperature removed from 298 kelvin.
You have a polypeptide that has been degraded with cyanogens bromide and trypsin. The sequences of the fragments are listed below. What is the sequence of the full polypeptide chain
The you heat it to 80 deg C and add 5.00 more grams of sugar. Assuming you do not get a supersaturated solution, what is the amount of sugar in the solution and the amount of solid out of solution, if he cools it to 58 deg C
How many moles of H3O+ must be added to 482 mL of a solution to adjust the pH from 8.80 to 5.56? Use E notation and 3 significant figures.
What is the limiting reagent? What is the theoretical yield of acetanilide? What is the percent yield if 3.3g of acetanilide is obtained?
Oxygen coming off the 2nd carbon and the 2nd carbon is also attached to the N. Two Carbons are attached to the Nitrogen). Account for the fact 2 equivalents of amine must be used.
Draw the structure of the organic compound that exists when lidocaine is in the presence of an acidic solution, for example, hydrochloric acid. You may use standard implicit style for atoms and lone-pairs if you like
28.80 mL of a 0.1726 mol/L EDTA solution is required to titrate a sample to the equivalence point. How many moles of divalent metal cations were in your sample
Calculate the molar solubility of AgBr in a 1.00 M aqueous solution of ammonia. Then calculate the solubility of AgBr in pure water, and compare the two solubilities. (Ksp for silver bromide is 7.7x10 -13 and Kf for Ag(NH3)2+ is 1.6x10^7)
the nuclear spin quantum number i of thenbsp39k nucleus is 32 and the nuclear g factor is 0.2606. how many orientations
Consider 4.90 L of a gas at 365 mmHg and 20. degrees celisus . If the container is compressed to 3.00 L and the temperature is increased to 40.degrees celisus , what is the new pressure, P2, inside the container
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